<template>
  <div class="app-container">

    <!--顶部Header 区域-->
    <mt-header fixed title="黑马程序员Vue项目">

      <span slot="left" @click="goback" v-show="flag">
          <mt-button icon="back">返回</mt-button>
      </span>

    </mt-header>

    <!--中间的路由 router-view 区域-->
    <transition>
      <router-view></router-view>
    </transition>

    <!--底部Tabber区域-->
    <nav class="mui-bar mui-bar-tab">
      <router-link class="mui-tab-item-hq" to="/home">
        <span class="mui-icon mui-icon-home"></span>
        <span class="mui-tab-label">首页</span>
      </router-link>
      <router-link class="mui-tab-item-hq" to="/member">
        <span class="mui-icon mui-icon-contact"></span>
        <span class="mui-tab-label">会员</span>
      </router-link>
      <router-link class="mui-tab-item-hq" to="/shopcar">
        <span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">
          {{$store.getters.getAllCount}}
        </span></span>
        <span class="mui-tab-label">购物车</span>
      </router-link>
      <router-link class="mui-tab-item-hq" to="/search">
        <span class="mui-icon mui-icon-search"></span>
        <span class="mui-tab-label">搜索</span>
      </router-link>
    </nav>


  </div>
</template>

<script>
  export default {
      data() {
          return {
              flag: flase
          };
      },
      created() {
          this.flag = this.$route.path = "/home" ? false : true;
      },
      methods: {
          goback() {
              //点击后退
              this.$router.go(-1);
          }
      },
      watch: {
          "$route.path": function (newVal) {
              if(newVal === "/home") {
                  this.flag = false;
              }else {
                  this.flag = true;
              }
          }
      }
  };

</script>


<style lang="scss" scoped>
  .app-container {
    padding-top: 40px;
    overflow-x: hidden;
    padding-bottom: 50px;
  }

  .v-enter {
    opacity: 0;
    transform: translateX(100%);
  }
  .v-leave-to {
    opacity: 0;
    transform: translateX(-100%);
    position: absolute;
  }

  .v-enter-active,
  .v-leave-active {
    transition: all 0.5s ease;
  }
  .mui-bar-tab .mui-tab-item-hq .mui-active {
    color: #007aff;
  }
  .mui-bar-tab .mui-tab-item-hq {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
  }
  .mui-bar-tab .mui-tab-item-hq .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
  }
  .mui-bar-tab .mui-tab-item-hq .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  mint-header {
    z-index: 1000;
  }
</style>
